Fitting-up bolt device



Dec; 4, 1928.

E. S. KLAUSNER FITTING UP BOLT DEYIQE File'd June 12, 1925 A TTOR/VEY .used for temporarily holding toget Patented Dec. l

- ff'j.f -jlsaiszs; UNITED TA S PATE T] oF cs.

EDWARD s. transmit, or OW'EGQ-NEW YORK.

FITTING-UP BOLT nnvrcn.

A ine-summed zune aisas. semi m. 30,604

This invention relates to fitting-upbolts er n proper relation plates or partsof structural iron and steel work preparatory to riveting.-

An object of the invention is to provide a fitting-up bolt device which overcomesthe drawbacks of ordinary fitting-up bolts, such as the time and labor required in unscrewing the nuts, and the difliculty of withdrawing the screw-threads of the bolts through the open-.

ings in the' parts, which may be out of line.

' A further object is ,to provide a very inexpensive and indefinitely reusable fitting-up device which employs a slotted block straddling a neck of an unthreaded part of the bolt, and which is so constructed that the block can be disengaged readily and very quickly.

In theaccompanying drawings, forming a part hereof:

Fig. 1 is an elevation ofthe assembled de-, vice, showing structural members in sectlon;

Fig. 2 is a similar view looking atright angles to'Fig. 1;

Figs. 3 and 4 are cross-sections taken re- ;pectwely on the lines 33 and ,44 of Figs. 5, 6 and 7 are end, side and plan views of the block; and

Figs. 8 and 9 are two elevations, looking at right angles to each other, of the forward portion of the bolt.

The bolt 1 has a screw-threaded portion 2,

which may be termed the rear portion. The major portion of the bolt, which is passed through the rivet holes in the structural parts a, a, is unthreaded, and further to facilitate the insertion of the bolt its forward'end 3 is tapered. A nut 4. is placed on the screw threaded portion of the bolt, for tightening the device.

The forward part of the bolt, in the basal portion of the tapered end, is recessed at opposite sides to form a neck 5, having flat sides 6. These sides are reversely inclined in crosssection so that the neck varies in width substantially from one end of the cross-section to the other, as seen in Fig; 3. The outer' Y shoulders 7 of the neck likewise slope mthe direction of their length, the slope being inward, that is to say, away from the point of the bolt, in the direction proceeding from the thinner end of the neck cross-sectionto the thicker end. The inner shoulders '8 extend at right angles to the length of the bolt, and

' may be sloped transversely of the bolt.

rivet isdriven in its place.

The part 9 is a ri id block having a slot'1 0 to pass overthe nec andbetween the shoul-' end to the front end of the block, similarly to v the slope of the shoulders 7 The, under surface of the block is straightand flat in order to give an equal and flat bearing on the surface of the steel, and to keep the block from creeping when strained."

The bolt having the nut thereon is inserted.

through the holes in the parts a, a, the nut being adjusted sothat the neck 5 of the bolt rojects at-the other side of the structure the nut. The block 9 is then placed transversel over the necked portion of the bolt, the wide end of the slot inthe block and the narrow end of the thickness of theblockbeing in advance, and passing first over the narrow end of-the neck and under the high end of the shoulders 7 The block having been loosely seated, the n'ut 4 is quickly tightened.

--When one or more of the rivets have been driven, the parts a, a are drawn together, and the block 9, by reason of the construction which has been described, can then be taken out by hand, or bya quick blow of the hammer, and it is not necessary to stop to unscrew or loosen the nut. The bolt is then withdrawn or driven out'easily and without injury, as there is no resistance due to screw-threads catching in the holes;'. and a It will be understood that the block of this device is 'not a wedge, the tightening being obtained by a nut. It is rather in the nature of a loose retaining collar, which is I held tight with the rest of'the device by the nut. When the strain is relieved by the driving of the rivets it may sometimes be picked out by hand. There, may be" some residual strain, however, holding the block after the rivets have been driven. Likewise, after-rev peated use there is likely tobe some distortion in the block or possibly in the bolt, and as the parts are made by casting the surfaces will not be perfectly smooth. If for any reason the block should stick, it can be quick- 1y dislodged by a tap of a hammer on'the bifurcated forward end. It will be observed and the sides 6 of the neck, are such that as soon as there is any rearward movement of the block there IS a separation between these surfaces, and for every degree of such movement there is a corresponding increase in separation. Consequently the block comes loose at once, and time will not be lost owing to persistent sticking, even though the parts be somewhat roughly made, and even though there may be some distortion as explained. For a practical reason it is important that the design of the device be such that it may be made by casting, rather than by machining, which would make the cost prohibitively high. My device can be made very cheaply and advantageously of malleable cast-iron, which has adequate strength but is somewhat bendable. When the block has been hammered a good many times on the ends of its bifurcations, these ends may become somewhat bent or upset, but they are so widely spaced owing to the divergence of the inner sides of the slots that the block will not bind seriously when it is removed. The plan of the device is one in which the block becomes, so to speak, both lower and wider with respect to the shouldered neck of the vbolt when it is displaced rearward,

In the fabrication of structural parts, speed is of the essence, and the practically instantaneous removability of this fitting-up device makes possible a very substantial saving in such manufacturing. Other advantages are the extremely low first cost of the devices, the capacity for indefinite reuse, the perfect interchangeability of the bolts and blocks, and the security with which the device temporarily holds the parts to be riveted.

While the preferred form of the invention has been described, I do not wish to limit myself to the precise details.

\Vhat I claim as new is:

A fitting-up bolt device', comprising a bolt threaded at one end and tapered at the opposite end,'the base of the tapered end portion being recessed to receive a wedge key, the recesses being in opposite sides of the bolt with their vertical walls formed of planes, lines lying in said planes and in a plane passing through the axis of the bolt being parallel to each other, said walls being relatively divergent in horizontal plane, the upper walls of the recesses inclining in the direction of divergence of the vertical walls, and the lower walls bein convergent with the upper walls and inclined downwardly and outwardly from the vertical walls, and a wedge key having divergent leg portions and their upper surfaces inclined downwardly in the direction of leg divergence, the lower surfaces of the legs being parallel to the horizontal plane of the key, whereby the divergent leg portions and inclined upper surfaces wedgingly cooperate withthe similar vertical and upper walls of the recesses, while the horizontal lower surfaces of the legs bear on the plates with which the bolt cooperates.

EDWARD S. KLAUSNER. 

